| #! /bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # Copyright (C) 2020 SUSE Linux Products GmbH. All Rights Reserved. |
| # |
| # FS QA Test No. btrfs/221 |
| # |
| # Test that an incremental send operation emits the correct path for link and |
| # rename operation after swapping the names and locations of several inodes in |
| # a way that creates a nasty dependency of rename and link operations. Notably |
| # one file has its name and location swapped with a directory for which it used |
| # to have a directory entry in it. |
| # |
| seq=`basename $0` |
| seqres=$RESULT_DIR/$seq |
| echo "QA output created by $seq" |
| |
| tmp=/tmp/$$ |
| status=1 # failure is the default! |
| trap "_cleanup; exit \$status" 0 1 2 3 15 |
| |
| _cleanup() |
| { |
| cd / |
| rm -fr $send_files_dir |
| rm -f $tmp.* |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| |
| # real QA test starts here |
| _supported_fs btrfs |
| _require_test |
| _require_scratch |
| _require_fssum |
| |
| send_files_dir=$TEST_DIR/btrfs-test-$seq |
| |
| rm -f $seqres.full |
| rm -fr $send_files_dir |
| mkdir $send_files_dir |
| |
| _scratch_mkfs >>$seqres.full 2>&1 |
| _scratch_mount |
| |
| touch $SCRATCH_MNT/a |
| touch $SCRATCH_MNT/b |
| mkdir $SCRATCH_MNT/testdir |
| # We want "a" to have a lower inode number than its parent directory, so it |
| # was created before the directory and then moved into it. |
| mv $SCRATCH_MNT/a $SCRATCH_MNT/testdir/a |
| |
| # Filesystem looks like: |
| # |
| # . (ino 256) |
| # |----- testdir/ (ino 259) |
| # | |----- a (ino 257) |
| # | |
| # |----- b (ino 258) |
| # |
| $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \ |
| $SCRATCH_MNT/mysnap1 > /dev/null |
| |
| $BTRFS_UTIL_PROG send -f $send_files_dir/1.snap \ |
| $SCRATCH_MNT/mysnap1 2>&1 1>/dev/null | _filter_scratch |
| |
| # Now rename 259 to "testdir_2", then change the name of 257 to "testdir" and |
| # make it a direct descendant of the root inode (256). Also create a new link |
| # for inode 257 with the old name of inode 258. By swapping the names and |
| # location of several inodes and create a nasty dependency chain of rename and |
| # link operations. |
| mv $SCRATCH_MNT/testdir/a $SCRATCH_MNT/a2 |
| touch $SCRATCH_MNT/testdir/a |
| mv $SCRATCH_MNT/b $SCRATCH_MNT/b2 |
| ln $SCRATCH_MNT/a2 $SCRATCH_MNT/b |
| mv $SCRATCH_MNT/testdir $SCRATCH_MNT/testdir_2 |
| mv $SCRATCH_MNT/a2 $SCRATCH_MNT/testdir |
| |
| # Filesystem now looks like: |
| # |
| # . (ino 256) |
| # |----- testdir_2/ (ino 259) |
| # | |----- a (ino 260) |
| # | |
| # |----- testdir (ino 257) |
| # |----- b (ino 257) |
| # |----- b2 (ino 258) |
| # |
| |
| $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \ |
| $SCRATCH_MNT/mysnap2 > /dev/null |
| $BTRFS_UTIL_PROG send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \ |
| $SCRATCH_MNT/mysnap2 2>&1 1>/dev/null | _filter_scratch |
| |
| $FSSUM_PROG -A -f -w $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1 |
| $FSSUM_PROG -A -f -w $send_files_dir/2.fssum \ |
| -x $SCRATCH_MNT/mysnap2/mysnap1 $SCRATCH_MNT/mysnap2 |
| |
| # Now recreate the filesystem by receiving both send streams and verify we get |
| # the same content that the original filesystem had. |
| _scratch_unmount |
| _scratch_mkfs >>$seqres.full 2>&1 |
| _scratch_mount |
| |
| $BTRFS_UTIL_PROG receive -f $send_files_dir/1.snap $SCRATCH_MNT > /dev/null |
| |
| # The receive operation below used to fail because when attemping to create the |
| # hard link named "b" for inode 257, the link operation contained a target path |
| # of "o259-6-0/a", which caused the receiver process to fail because inode 259 |
| # was not yet orphanized (renamed to "o259-6-0"), it still had the name "testdir" |
| # when the link operation was issued. |
| $BTRFS_UTIL_PROG receive -f $send_files_dir/2.snap $SCRATCH_MNT > /dev/null |
| |
| $FSSUM_PROG -r $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1 |
| $FSSUM_PROG -r $send_files_dir/2.fssum $SCRATCH_MNT/mysnap2 |
| |
| status=0 |
| exit |